:root {
    color-scheme: light;
    --bg: #f5f5f7;
    --panel: rgba(255,255,255,.86);
    --text: #1d1d1f;
    --muted: #6e6e73;
    --line: #d2d2d7;
    --accent: #0071e3;
    --danger: #b42318;
    --shadow: 0 18px 48px rgba(0,0,0,.08);
}
* { box-sizing: border-box; }
body {
    margin: 0;
    background: radial-gradient(circle at top left, #ffffff 0, var(--bg) 36rem);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
    letter-spacing: 0;
}
a { color: inherit; text-decoration: none; }
.shell { min-height: 100vh; display: grid; grid-template-columns: 1fr; }
.shell.has-sidebar { grid-template-columns: 17rem 1fr; }
.sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    padding: 1.25rem;
    border-right: 1px solid var(--line);
    background: rgba(245,245,247,.72);
    backdrop-filter: blur(24px);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}
.brand { display: flex; align-items: center; gap: .75rem; font-weight: 700; }
.brand-mark {
    width: 2.35rem; height: 2.35rem; display: grid; place-items: center;
    color: #fff; background: #111; border-radius: .7rem; font-size: .85rem;
}
nav { display: grid; gap: .35rem; }
nav a, .ghost {
    padding: .75rem .8rem; border-radius: .75rem; color: var(--muted);
    border: 0; background: transparent; font: inherit; text-align: left; cursor: pointer;
}
nav a:hover, .ghost:hover { background: #fff; color: var(--text); }
.main { padding: 2rem; max-width: 1280px; width: 100%; margin: 0 auto; }
.page-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; margin-bottom: 1.5rem; }
h1 { margin: .15rem 0; font-size: clamp(2rem, 4vw, 3.5rem); line-height: 1.02; }
h2 { margin: 0 0 1rem; font-size: 1.2rem; }
h3 { margin: 1.25rem 0 .75rem; font-size: 1rem; }
.eyebrow { margin: 0; color: var(--accent); font-size: .78rem; font-weight: 700; text-transform: uppercase; }
.muted { color: var(--muted); }
.panel {
    background: var(--panel);
    border: 1px solid rgba(210,210,215,.72);
    border-radius: 1rem;
    box-shadow: var(--shadow);
    padding: 1.1rem;
}
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(19rem, 1fr)); gap: 1rem; margin-bottom: 1rem; }
.grid.two { grid-template-columns: repeat(auto-fit, minmax(22rem, 1fr)); }
.stats { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1rem; margin-bottom: 1rem; }
.stats span { display: block; color: var(--muted); }
.stats strong { font-size: 2.3rem; }
.section-head, .actions { display: flex; align-items: center; justify-content: space-between; gap: .75rem; }
.actions { flex-wrap: wrap; }
.list { display: grid; gap: .5rem; }
.row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto;
    gap: .75rem;
    align-items: center;
    padding: .8rem;
    border: 1px solid var(--line);
    border-radius: .8rem;
    background: rgba(255,255,255,.66);
}
.row small { color: var(--muted); }
.compact .row { padding: .6rem; }
.form { display: grid; gap: .9rem; }
.form.wide { max-width: 44rem; }
label { display: grid; gap: .35rem; color: var(--muted); font-size: .9rem; }
input, select {
    width: 100%;
    border: 1px solid var(--line);
    background: #fff;
    border-radius: .72rem;
    padding: .78rem .85rem;
    font: inherit;
    color: var(--text);
}
.split, .inline-form { display: grid; grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr)); gap: .75rem; }
.inline-form { margin-top: .8rem; align-items: end; }
.check { display: flex; align-items: center; gap: .55rem; }
.check input { width: auto; }
button, .button {
    border: 0;
    background: var(--accent);
    color: #fff;
    padding: .78rem 1rem;
    border-radius: 999px;
    font: inherit;
    font-weight: 650;
    cursor: pointer;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    white-space: nowrap;
}
.button.secondary { background: #1d1d1f; }
.danger { color: var(--danger); }
.notice, .alert {
    margin-bottom: 1rem;
    padding: .85rem 1rem;
    border-radius: .85rem;
    background: #e7f3ff;
    color: #064f91;
}
.alert { background: #fff0ef; color: var(--danger); }
.auth-panel {
    min-height: calc(100vh - 4rem);
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(18rem, 28rem);
    align-items: center;
    gap: 2rem;
    width: min(100%, 68rem);
    margin: 0 auto;
}
@media (max-width: 800px) {
    .shell.has-sidebar { grid-template-columns: 1fr; }
    .sidebar { position: static; height: auto; flex-direction: row; align-items: center; overflow-x: auto; }
    nav { display: flex; }
    .main { padding: 1rem; }
    .auth-panel { grid-template-columns: 1fr; align-content: center; min-height: calc(100vh - 2rem); }
    .stats { grid-template-columns: 1fr; }
    .row { grid-template-columns: 1fr; }
    .page-head { display: grid; }
}